US20210062925A1 - Systems for rupturing a vacuum in a medical imaging device - Google Patents
Systems for rupturing a vacuum in a medical imaging device Download PDFInfo
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- US20210062925A1 US20210062925A1 US16/553,844 US201916553844A US2021062925A1 US 20210062925 A1 US20210062925 A1 US 20210062925A1 US 201916553844 A US201916553844 A US 201916553844A US 2021062925 A1 US2021062925 A1 US 2021062925A1
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- Prior art keywords
- puncture
- puncture tool
- vacuum
- vacuum plug
- plug
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
- F16K13/04—Other constructional types of cut-off apparatus; Arrangements for cutting-off with a breakable closure member
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/3804—Additional hardware for cooling or heating of the magnet assembly, for housing a cooled or heated part of the magnet assembly or for temperature control of the magnet assembly
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
- G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
Definitions
- the present disclosure generally relates to systems for rupturing a vacuum in a medical imaging device, and more particularly to point of use systems for rupturing a vacuum in a magnetic resonance imaging device.
- Certain medical imaging devices such as magnetic resonance or MR devices, require a vacuum for the magnetic components to function.
- the process of releasing or “quenching” the vacuum after use is completed is normally performed electronically, which deactivates the magnetic forces produced by the medical device.
- manual backups are also provided for quickly quenching or breaking the vacuum vessel to quickly deactivate magnetic forces.
- the vacuum must be quickly broken in emergency situations in which a patient, equipment (i.e., an oxygen canister), and/or other personnel or objects become trapped or are otherwise unintentionally drawn magnetically to the medical imaging device.
- emergency situations may arise through the accidental introduction of ferrous materials within proximity of the magnetic device during operation.
- One embodiment of the present disclosure generally relates to a system for rupturing a vacuum in a medical imaging device.
- the system includes a vacuum plug attached to the medical imaging device and configured to retain a vacuum in the medical imaging device.
- a puncture tool is configured to puncture the vacuum plug to rupture the vacuum in the medical imaging machine.
- a puncture tool retainer removably couples the puncture tool to the medical imaging device.
- the system includes a vacuum plug configured to be coupled to the magnetic resonance imaging device.
- the vacuum plug has parallel outer and inner surfaces and perpendicularly defining a rupture passage therethrough.
- a puncture tool retainer receiver is also defined within the outer surface.
- a rupture disk sealingly covers the rupture passage defined within the vacuum plug to retain the vacuum in the magnetic resonance imaging device.
- a puncture tool extends from a handle to a puncture tip, the puncture tip being angled and configured to puncture the rupture disk when a force is applied via the handle by the puncture tip upon the rupture disk.
- a puncture tool retainer is receivable within the puncture tool retainer receiver such that the puncture tool retainer removably couples the puncture tool to the vacuum plug. The vacuum is ruptured when the rupture disk is punctured.
- Another embodiment generally relates to a magnetic resonance imaging (MRI) device that includes a vacuum plug attached to a body of the MRI device and configured to retain a vacuum in the MRI device.
- a puncture tool is configured to puncture the vacuum plug to rupture the vacuum in the MRI device.
- a puncture tool retainer removably couples the puncture tool to the MRI device.
- FIG. 1 is a front, close up view of a medical imaging device with a cover removed to reveal a system for rupturing a vacuum according to the present disclosure
- FIGS. 2 and 3 are isometric upper and lower views of the system shown in FIG. 1 removed from the medical imaging device;
- FIG. 4 is an upper view of the system shown in FIG. 2 ;
- FIG. 5 is a sectional view taken along the line 5 - 5 of FIG. 4 ;
- FIG. 6 is a sectional view similar to that shown in FIG. 5 , now with the puncture tool removed and inserted to rupture the vacuum according to the present disclosure.
- MR imaging devices require mechanisms to quickly break the vacuum to atmosphere in an emergency situation.
- a manual mechanism for breaking this vacuum is required as a backup.
- the manual methods presently known in the art rely upon a vacuum breaking tool that is connectable to a vacuum rupture access point to perform this safety back up in the event of such emergency.
- the vacuum break tool function opens the MR magnet vacuum vessel to atmosphere and disrupt the thermal performance used to maintain the super connecting capacity of the magnet, initiating the quench to cause loss of magnetic field.
- FIG. 1 shows one embodiment of a system 10 for rupturing a vacuum in a medical imaging device according to the present disclosure.
- FIG. 1 shows part of a magnetic resonance (MR) device 1 with a cover removed to reveal a vacuum rupture access point 4 as presently known in the art.
- the MR device 1 shown incorporates the presently disclosed system 10 .
- the system 10 includes a novel vacuum plug 20 for sealing the vacuum vessel within the MR system 1 , as well as the puncture tool 50 for rupturing the vacuum right at this point of use.
- the vacuum plug 20 has an outer surface 22 , an inner surface 23 , and a side wall 28 extending therebetween.
- the side wall 28 includes coupling features 27 for sealingly coupling the vacuum plug 20 to the MR device 1 in a manner known in the art. These coupling procedures 27 provide that the vacuum plug 20 disclosed herewith may be retrofitted into MR devices 1 presently known in the art to seal the respective vacuum vessels therein.
- the vacuum plug 20 defines a rupture passage 26 between the outer surface 22 and the inner surface 23 .
- a rupture disk 30 is provided at the inner surface 23 of the vacuum plug 20 and provides a hermetic seal over the rupture passage 26 such that when the rupture disk 30 is intact, the vacuum plug 20 may maintain a vacuum within the MR device 1 .
- the system 10 further includes a puncture tool 50 configured to break the rupture disk 30 in a manner to be described further below.
- the puncture tool 50 has a handle 60 and a puncture portion 70 that extends from the handle 60 to a puncture tip 74 .
- the handle 60 is intended for a user to grip the puncture tool 50 to apply the force necessary for the puncture tip 70 to puncture the rupture disk 30 in the manner described further below.
- the puncture portion 70 of the puncture tool 50 has an angled portion 76 . Providing this angled portion 76 reduces the surface area in which forces applied to the puncture tool 50 are applied to the rupture disk 30 to assist in its rupture. Additionally or alternatively, the puncture tip 74 may be hollow such that it defines an opening 78 therein, further assisting in maximizing the force provided by the puncture tip 74 on the rupture disk 30 .
- the rupture disk 30 is coupled to the inner surface 23 of the vacuum plug 20 , in the present embodiment within a recess 25 defined therein.
- the rupture disk 30 has a flange 32 for coupling to the inner surface 23 of the vacuum plug 20 , such as by welding, adhesives, or other techniques known in the art.
- the rupture disk 30 includes a center portion 34 , and in the present embodiment is a reverse buckling rupture disk.
- the center 34 includes a raised portion 36 and a convex portion 38 that extends towards the outer surface 22 of the vacuum plug 20 .
- the rupture disk 30 as presently depicted includes a score line 33 , similar to that provided on the top of a soda can. The score line 33 further assists with the puncturing of the rupture disk 30 , as well as defining where within the rupture disk 30 the puncturing occurs.
- FIGS. 2 and 4-5 depict the puncture tool 50 retained on, or removably coupled to, the vacuum plug 20 .
- FIG. 6 depicts the puncture tool 50 removed and actively puncturing the rupture disk 30 of the vacuum plug 20 .
- the puncture tool retainer 90 has a head 92 and extends to an inner point 94 with retention features 96 , shown here as ribs, therebetween.
- the puncture tool retainer 90 is first received through a puncture tool retainer passthrough 62 defined within the handle 60 of the puncture tool 50 , and then extends into a puncture tool retainer receiver 24 defined within the outer surface 22 of the vacuum plug 20 .
- the retention features 96 are designed to engage with the puncture tool retainer receiver 24 to prevent removal of the puncture tool 50 from the vacuum plug 20 .
- the puncture tool retainer 90 is a Christmas tree type plug that retains the puncture tool 50 on the surface of the vacuum plug 20 .
- the puncture tool 50 is removable, without the use of tools, by applying a force away from the outer surface 22 to overcome the friction and/or other retention forces provided by the retention features 96 .
- the retention features 96 may also or alternatively include threads, a rotating lock system, or other methods for removably coupling the puncture tool 50 to the vacuum plug 20 , which may be single-use or reinsertable, for example.
- the puncture tool 50 As best shown in FIG. 6 , once the puncture tool 50 is removed from its storage position on the vacuum plug 20 , it is rotated in a perpendicular orientation such that the puncture portion 70 of the puncture tool 50 may be inserted into the rupture passage 26 defined through the vacuum plug 20 . As shown, the puncture tip 74 of the puncture tool 50 has punctured the rupture disk 30 along the score line 33 defined therein, which in certain embodiments does not completely encircle the center 34 of the rupture disk 30 .
- a frustum reverse buckling (FRB) rupture disk as the rupture disk 30 provides particular advantages in being small, requiring low pressures to rupture, being readily available in the commercial market, and providing demonstrated reliable and accurate performance within aircraft, defense, automotive, and OEM industries.
- This type of rupture disk 30 further includes the benefits of being low cost, being designed for non-fragmentation upon puncture, having accurate and reliable burst ratings, providing full opening in either gas or liquid service, withstanding full vacuum, permitting small diameters, and having standard and custom holder designs readily available within the market.
- the present inventor has identified that the presently disclosed design 10 is advantageous in the context of an MR device 1 in that it creates no changes to the magnetic field and is not impacted by the magnetic field, has a low part count, provides mounting of the vacuum plug 20 and also the puncture tool 50 within a single, familiar location, and provides that the puncture tool 50 may be produced through inexpensive parts, including plastics and other polymers. Moreover, the puncture tool 50 is located at the point of use, but nonetheless remains hidden behind the current cover of the MR device 1 .
- the system 10 further includes the benefits of having a low probability of inadvertent actuation, which destroys the magnet of the MR device 1 and must be reserved for use only in emergency circumstances.
- the present inventor has conducted real world testing as confirmation of the system 10 functioning in an MR device 1 .
- 75 psi rupture disks 30 were used in conjunction with a puncture tool 50 having a 3/16′′ outer diameter puncture tip 74 .
- the present inventor identified an average breaking force requirement of 8-10 pounds to puncture the rupture disk 30 when using a puncture tip 74 comprised of nylon 6/6.
- the use of nylon 6/6 was further advantageous over certain other materials in that it provided the necessary strength, which also being non-corrosive and thermally stabile from ⁇ 40° C. to +55° C.
Abstract
Description
- The present disclosure generally relates to systems for rupturing a vacuum in a medical imaging device, and more particularly to point of use systems for rupturing a vacuum in a magnetic resonance imaging device.
- Certain medical imaging devices, such as magnetic resonance or MR devices, require a vacuum for the magnetic components to function. The process of releasing or “quenching” the vacuum after use is completed is normally performed electronically, which deactivates the magnetic forces produced by the medical device. However, there is a requirement that manual backups are also provided for quickly quenching or breaking the vacuum vessel to quickly deactivate magnetic forces. In particular, the vacuum must be quickly broken in emergency situations in which a patient, equipment (i.e., an oxygen canister), and/or other personnel or objects become trapped or are otherwise unintentionally drawn magnetically to the medical imaging device. For example, emergency situations may arise through the accidental introduction of ferrous materials within proximity of the magnetic device during operation.
- This Summary is provided to introduce a selection of concepts that are further described below in the Detailed Description. This Summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in limiting the scope of the claimed subject matter.
- One embodiment of the present disclosure generally relates to a system for rupturing a vacuum in a medical imaging device. The system includes a vacuum plug attached to the medical imaging device and configured to retain a vacuum in the medical imaging device. A puncture tool is configured to puncture the vacuum plug to rupture the vacuum in the medical imaging machine. A puncture tool retainer removably couples the puncture tool to the medical imaging device.
- Another embodiment generally relates to a system for rupturing a vacuum in a magnetic resonance imaging device. The system includes a vacuum plug configured to be coupled to the magnetic resonance imaging device. The vacuum plug has parallel outer and inner surfaces and perpendicularly defining a rupture passage therethrough. A puncture tool retainer receiver is also defined within the outer surface. A rupture disk sealingly covers the rupture passage defined within the vacuum plug to retain the vacuum in the magnetic resonance imaging device. A puncture tool extends from a handle to a puncture tip, the puncture tip being angled and configured to puncture the rupture disk when a force is applied via the handle by the puncture tip upon the rupture disk. A puncture tool retainer is receivable within the puncture tool retainer receiver such that the puncture tool retainer removably couples the puncture tool to the vacuum plug. The vacuum is ruptured when the rupture disk is punctured.
- Another embodiment generally relates to a magnetic resonance imaging (MRI) device that includes a vacuum plug attached to a body of the MRI device and configured to retain a vacuum in the MRI device. A puncture tool is configured to puncture the vacuum plug to rupture the vacuum in the MRI device. A puncture tool retainer removably couples the puncture tool to the MRI device.
- Various other features, objects and advantages of the disclosure will be made apparent from the following description taken together with the drawings.
- The present disclosure is described with reference to the following Figures.
-
FIG. 1 is a front, close up view of a medical imaging device with a cover removed to reveal a system for rupturing a vacuum according to the present disclosure; -
FIGS. 2 and 3 are isometric upper and lower views of the system shown inFIG. 1 removed from the medical imaging device; -
FIG. 4 is an upper view of the system shown inFIG. 2 ; -
FIG. 5 is a sectional view taken along the line 5-5 ofFIG. 4 ; and -
FIG. 6 is a sectional view similar to that shown inFIG. 5 , now with the puncture tool removed and inserted to rupture the vacuum according to the present disclosure. - As discussed above, magnetic resonance (MR) imaging devices require mechanisms to quickly break the vacuum to atmosphere in an emergency situation. In the context of medical devices in which patients may be involved, a manual mechanism for breaking this vacuum is required as a backup. The manual methods presently known in the art rely upon a vacuum breaking tool that is connectable to a vacuum rupture access point to perform this safety back up in the event of such emergency. Specifically, the vacuum break tool function opens the MR magnet vacuum vessel to atmosphere and disrupt the thermal performance used to maintain the super connecting capacity of the magnet, initiating the quench to cause loss of magnetic field.
- While presently known vacuum breaking tools work when used correctly, the present inventor has identified that the effectiveness of these tools rely upon proper training of MRI facilities, field engineers, immediate medical personnel, and technicians being trained on the use of the tool. Moreover, the effectiveness of the tool relies upon the personnel in the immediate area knowing the whereabouts of the tool at all times. Following a recent study of the field, the present inventor has identified that the number of sites in which the emergency vacuum break tool was missing, or not immediately accessible, was cause for concern. Accordingly, the present inventor has developed a simpler, point of use system for rupturing a vacuum in a medical imaging device, replacing the problematic devices presently known in the art.
-
FIG. 1 shows one embodiment of asystem 10 for rupturing a vacuum in a medical imaging device according to the present disclosure. In particular,FIG. 1 shows part of a magnetic resonance (MR)device 1 with a cover removed to reveal a vacuumrupture access point 4 as presently known in the art. However, in contrast to MR devices presently known in the art, theMR device 1 shown incorporates the presently disclosedsystem 10. Thesystem 10 includes anovel vacuum plug 20 for sealing the vacuum vessel within theMR system 1, as well as thepuncture tool 50 for rupturing the vacuum right at this point of use. - As shown in
FIGS. 2-6 , thevacuum plug 20 has anouter surface 22, aninner surface 23, and aside wall 28 extending therebetween. Theside wall 28 includes coupling features 27 for sealingly coupling thevacuum plug 20 to theMR device 1 in a manner known in the art. Thesecoupling procedures 27 provide that thevacuum plug 20 disclosed herewith may be retrofitted intoMR devices 1 presently known in the art to seal the respective vacuum vessels therein. - As shown in
FIG. 5 , thevacuum plug 20 defines arupture passage 26 between theouter surface 22 and theinner surface 23. Arupture disk 30 is provided at theinner surface 23 of thevacuum plug 20 and provides a hermetic seal over therupture passage 26 such that when therupture disk 30 is intact, thevacuum plug 20 may maintain a vacuum within theMR device 1. - The
system 10 further includes apuncture tool 50 configured to break therupture disk 30 in a manner to be described further below. As shown inFIG. 4 , thepuncture tool 50 has ahandle 60 and apuncture portion 70 that extends from thehandle 60 to apuncture tip 74. In certain embodiments, thehandle 60 is intended for a user to grip thepuncture tool 50 to apply the force necessary for thepuncture tip 70 to puncture therupture disk 30 in the manner described further below. - In the embodiment shown in
FIG. 4 , thepuncture portion 70 of thepuncture tool 50 has anangled portion 76. Providing thisangled portion 76 reduces the surface area in which forces applied to thepuncture tool 50 are applied to therupture disk 30 to assist in its rupture. Additionally or alternatively, thepuncture tip 74 may be hollow such that it defines anopening 78 therein, further assisting in maximizing the force provided by thepuncture tip 74 on therupture disk 30. - As best shown in
FIG. 5 , therupture disk 30 is coupled to theinner surface 23 of thevacuum plug 20, in the present embodiment within arecess 25 defined therein. In the embodiment shown, therupture disk 30 has aflange 32 for coupling to theinner surface 23 of thevacuum plug 20, such as by welding, adhesives, or other techniques known in the art. Therupture disk 30 includes acenter portion 34, and in the present embodiment is a reverse buckling rupture disk. Thecenter 34 includes a raisedportion 36 and aconvex portion 38 that extends towards theouter surface 22 of thevacuum plug 20. As shown inFIG. 3 , therupture disk 30 as presently depicted includes ascore line 33, similar to that provided on the top of a soda can. Thescore line 33 further assists with the puncturing of therupture disk 30, as well as defining where within therupture disk 30 the puncturing occurs. - As discussed above, the present inventor has identified that no systems presently known in the art incorporate a
puncture tool 50 at the point of use in conjunction with thevacuum plug 20. Instead, prior art tools are typically kept in storage closets, desks, or administrative areas away from theMR device 1. Thesystem 10 presently disclosed provides apuncture tool retainer 90 that removably couples thepuncture tool 50 directly to thevacuum plug 20.FIGS. 2 and 4-5 depict thepuncture tool 50 retained on, or removably coupled to, thevacuum plug 20.FIG. 6 depicts thepuncture tool 50 removed and actively puncturing therupture disk 30 of thevacuum plug 20. In the embodiment shown, thepuncture tool retainer 90 has ahead 92 and extends to aninner point 94 with retention features 96, shown here as ribs, therebetween. Thepuncture tool retainer 90 is first received through a puncture tool retainer passthrough 62 defined within thehandle 60 of thepuncture tool 50, and then extends into a puncturetool retainer receiver 24 defined within theouter surface 22 of thevacuum plug 20. As best shown inFIG. 5 , the retention features 96 are designed to engage with the puncturetool retainer receiver 24 to prevent removal of thepuncture tool 50 from thevacuum plug 20. In the embodiment shown, thepuncture tool retainer 90 is a Christmas tree type plug that retains thepuncture tool 50 on the surface of thevacuum plug 20. In this manner, thepuncture tool 50 is removable, without the use of tools, by applying a force away from theouter surface 22 to overcome the friction and/or other retention forces provided by the retention features 96. It should be recognized that the retention features 96 may also or alternatively include threads, a rotating lock system, or other methods for removably coupling thepuncture tool 50 to thevacuum plug 20, which may be single-use or reinsertable, for example. - As best shown in
FIG. 6 , once thepuncture tool 50 is removed from its storage position on thevacuum plug 20, it is rotated in a perpendicular orientation such that thepuncture portion 70 of thepuncture tool 50 may be inserted into therupture passage 26 defined through thevacuum plug 20. As shown, thepuncture tip 74 of thepuncture tool 50 has punctured therupture disk 30 along thescore line 33 defined therein, which in certain embodiments does not completely encircle thecenter 34 of therupture disk 30. - The present inventor has identified that a frustum reverse buckling (FRB) rupture disk as the
rupture disk 30 provides particular advantages in being small, requiring low pressures to rupture, being readily available in the commercial market, and providing demonstrated reliable and accurate performance within aircraft, defense, automotive, and OEM industries. This type ofrupture disk 30 further includes the benefits of being low cost, being designed for non-fragmentation upon puncture, having accurate and reliable burst ratings, providing full opening in either gas or liquid service, withstanding full vacuum, permitting small diameters, and having standard and custom holder designs readily available within the market. - Additionally, the present inventor has identified that the presently disclosed
design 10 is advantageous in the context of anMR device 1 in that it creates no changes to the magnetic field and is not impacted by the magnetic field, has a low part count, provides mounting of thevacuum plug 20 and also thepuncture tool 50 within a single, familiar location, and provides that thepuncture tool 50 may be produced through inexpensive parts, including plastics and other polymers. Moreover, thepuncture tool 50 is located at the point of use, but nonetheless remains hidden behind the current cover of theMR device 1. Thesystem 10 further includes the benefits of having a low probability of inadvertent actuation, which destroys the magnet of theMR device 1 and must be reserved for use only in emergency circumstances. - The present inventor has conducted real world testing as confirmation of the
system 10 functioning in anMR device 1. In the embodiment tested, 75psi rupture disks 30 were used in conjunction with apuncture tool 50 having a 3/16″ outerdiameter puncture tip 74. The present inventor identified an average breaking force requirement of 8-10 pounds to puncture therupture disk 30 when using apuncture tip 74 comprised of nylon 6/6. The use of nylon 6/6 was further advantageous over certain other materials in that it provided the necessary strength, which also being non-corrosive and thermally stabile from −40° C. to +55° C. - This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to make and use the invention. Certain terms have been used for brevity, clarity, and understanding. No unnecessary limitations are to be inferred therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes only and are intended to be broadly construed. The patentable scope of the invention is defined by the claims and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have features or structural elements that do not differ from the literal language of the claims, or if they include equivalent features or structural elements with insubstantial differences from the literal languages of the claims.
Claims (20)
Priority Applications (2)
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US16/553,844 US11313481B2 (en) | 2019-08-28 | 2019-08-28 | Systems for rupturing a vacuum in a medical imaging device |
CN202010711363.1A CN112438717A (en) | 2019-08-28 | 2020-07-22 | System for breaking vacuum in medical imaging devices |
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US16/553,844 US11313481B2 (en) | 2019-08-28 | 2019-08-28 | Systems for rupturing a vacuum in a medical imaging device |
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US1879382A (en) * | 1929-04-10 | 1932-09-27 | Kidde & Co Walter | Valve |
US3633596A (en) * | 1970-07-23 | 1972-01-11 | Us Navy | Diaphragm valve |
US4516404A (en) * | 1984-03-30 | 1985-05-14 | General Electric Company | Foam filled insert for horizontal cryostat penetrations |
US4739799A (en) * | 1986-10-20 | 1988-04-26 | Carney Joseph H | Plumbing test plug |
EP0284874A1 (en) * | 1987-04-02 | 1988-10-05 | General Electric Company | Thermal interface for interconnecting a cryocooler and a magnetic resonance imaging cryostat |
US6527754B1 (en) * | 1998-12-07 | 2003-03-04 | Std Manufacturing, Inc. | Implantable vascular access device |
JP2002248097A (en) * | 2001-02-23 | 2002-09-03 | Mitsubishi Heavy Ind Ltd | High speed x-ray ct instrument |
JP2003070765A (en) * | 2001-08-31 | 2003-03-11 | Hitachi Ltd | Magnetic resonance imaging unit and method and material for sound insulation thereof |
US20080242974A1 (en) * | 2007-04-02 | 2008-10-02 | Urbahn John A | Method and apparatus to hyperpolarize materials for enhanced mr techniques |
JP4796995B2 (en) * | 2007-06-11 | 2011-10-19 | 株式会社日立製作所 | Superconducting magnet device, magnetic resonance imaging device using the same, and nuclear magnetic resonance device |
US8570043B2 (en) * | 2010-10-05 | 2013-10-29 | General Electric Company | System and method for self-sealing a coldhead sleeve of a magnetic resonance imaging system |
GB2499815B (en) * | 2012-02-29 | 2014-05-28 | Siemens Plc | Over-pressure limiting arrangement for a cryogen vessel |
DE102012212063B4 (en) * | 2012-07-11 | 2015-10-22 | Siemens Aktiengesellschaft | Magnetic field generating device with alternative quenching device |
WO2016005882A1 (en) * | 2014-07-07 | 2016-01-14 | Victoria Link Ltd | Method and apparatus for cryogenic cooling of hts devices immersed in liquid cryogen |
JP6472673B2 (en) * | 2015-01-28 | 2019-02-20 | キヤノンメディカルシステムズ株式会社 | Magnetic resonance imaging system |
US10548567B2 (en) * | 2016-12-13 | 2020-02-04 | General Electric Company | System and method for displaying medical images of an object within a patient |
DE102017201755A1 (en) * | 2017-02-03 | 2018-08-09 | B. Braun Melsungen Ag | Penetration part for a medical infusion system, drip chamber and infusion system |
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CN112438717A (en) | 2021-03-05 |
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